// create by hrj
// Current time: 2025-03-17 17:31:58.770
#include "/home/hrj/projects/leetcode/headFile.h"

class Solution {
public:
    string alienOrder(vector<string>& words) {
        std::unordered_map<char,vector<char>> graph;
        int n = words.size();
        
    }
};